"Extra special Guests"

The 6/30/96 Show at Birdland is listed in the coast as a cool blue halo
record release featuring the band plus "extra special guests"...... How far
should I be reading into this? Does it mean"the lads" first non rooftop
appearance in some time, is it Clarke & co.'s way of saying "we haven't
quite signed an opener just yet", Or is it just another sick stunt on the
part of some Coast intern? (no porn this time).... any guesses???